FRS-15 Standard Stock Kit (Black)

SKU #4001SB



Installation Video Installation Video    Printable Installation Instructions

U.S. PATENT NUMBER 9,568,273 B2

Availability: In stock


For more information on converting A2 "rifle length", or pinned carbine stocks please check our video section located on the home page.





Sadly, several states in our great country mischaracterize certain types of semiautomatic firearms, like AR-10 and AR-15 variants, as "Assault Weapons". Some states have enacted laws that restrict common features, including a pistol grip and adjustable stock. Somehow they believe that these features make firearms more dangerous. For law abiding citizens that own these weapons, it could mean confiscation and possibly criminal prosecution.

The FRS-15 Rifle Stock is designed help law abiding citizens keep their firearms in compliance with these laws. Replacing the pistol grip and adjustable stock with the FRS-15 rifle stock, effectively eliminates these two prohibited characteristics while preserving all of the weapons functionality.

It took nearly two years of research and development for the FRS-15 Rifle Stock to reach its current form. It is an excellent blend of form and function. Shooters of all types will appreciate the feel of its traditional hunting rifle style curved grasp and solid shouldering.

With multiple sling hard points and adjustable cheek rise, (optional) the FRS-15 can be easily configured for hunting, plinking, tactical training, or competition shooting. Many other upgrades and accessories are also available.



Our FRS-15 kits are not only designed to be the most ergonomic solution for featureless conversions, they are also tailored to meet our customers individual needs and budgets. Many people use their rifles in different ways and our Standard and Enhanced kits allow for maximum utility. The difference in the two kits is the Buffer Tube Cover. The Standard FRS-15 kits are tailored more for those who primarily shoot from a bench or prefer a two point sling. The Enhanced FRS-15 kits include two additional quick detach sling hard points. The advantage is that if a user prefers a single point sling, the center of gravity is in line with the barrel which keeps the muzzle pointed straight down.





  • Fits any standard carbine length recoil system
  • Fits any brand of forged AR-15 receiver
  • Fits many brands of billet AR-15 receivers
  • Fits many DPMS profile AR-10 variant lowers (with optional adapter)
  • Fits Black Rain Ordinance and Windham Weaponry AR-10 variant lowers (with optional adapter)
  • Fits Smith & Wesson M&P 15/22 (with optional adapter)


  • Two quick detach sling hard points
  • Single point sling loop behind grip
  • Aggressively checkered grip
  • Interchangeable side panels
  • Grip storage compartment
  • Rubber buttpad
  • Many upgrades & accessories available


  • Material: 33% Glass filled Nylon
  • Hard points: Black oxide coated steel
  • Overall length 13"
  • Length of pull: 14"
  • Stock weight: 11.5 oz.
  • Buffer tube cover weight: 2.6 oz.
  • Buffer tube cover length: 7.5"


  • FRS-15 Rifle Stock
  • Standard Buffer Tube Cover
  • Ergonomic Endplate
  • Mounting hardware
  • Full color installation instructions


It is the responsibility of firearms dealers and private firearms owners to know and fully understand all federal, state, and local firearms laws in their area. Thordsen Customs LLC will not be held liable for any misuse of its products and will assume that our product(s) comply with state and local laws unless otherwise notified by authorities.


Top NotchReview by MichiganBorn
I dont need to have this stock configuration for my AR being in Michigan, however I liked the look if it. When I bought it, and put it on a new build, I was impressed. I love the rifle grip feel. It's very natural growing up shooting deer. Excellent craftsman ship! Great furniture! Fast shipping! Great price! Thank you! (Posted on 8/11/2018)
Love this stockReview by Matt P.
I've had my AR for a few years and hardly ever shot it because I never really could warm up to the feel of a pistol grip on a rifle. It probably would have remained in the back of the safe if the state of Ca. hadn't nudged me in the direction to go featureless with it. This stock gave my rifle a more traditional feel and it will definitely see a lot more use now. I ended up leaving the buffer tube cover off as it leaves my hand a bit more room without it. All in all, very satisfied and even if they told me tomorrow that I could have a full featured AR, I'd still keep this stock on my rifle. (Posted on 4/20/2018)
Perfect for CaliforniaReview by Joey Jojo
Seeking a featureless conversion for California, I tried a couple of different grip designs but kept coming back to the fact that I have much better control with my thumb wrapped around a grip. The Thordsen is quite ergonomic, at least for me, and the optional snap-on cheek riser that clips onto the buffer tube cover just happens to be very close to my natural point of aim. I would still prefer the standard grip, but here behind enemy lines you take what you can get and in this case it's pretty dang functional. Seems to be high quality material and build. And now I have a normal mag release - yahoo! (Posted on 10/17/2017)
Great stockReview by Tony
Installed on my rifle a month ago after looking at other options. This stock fit perfectly, no complaints. Feels natural and FYI I shot Left Handed. Great stock, highly recommend. (Posted on 5/19/2017)
I like itReview by Tony
I bought the kit from Turners, good price. Installed as directed, easily done with great instructions, no hassle. Looks good and feels natural. I was worried that holding my rifle would feel strange, but it feels normal. I went to range same day with my daughter who has been shooting for about 5 years now and her friend who had never fired a weapon. No complaints or issues. They both shoot Right hand and I shoot Left hand. Felt amazing and very impressed with the quality of the stock. Only cons, my kit did not come with a check rise (aiming though rear and front sight was no problem, even without it) and storage compartment cover does not stay on. Regardless, I am extremely happy and definitely recommend the stock. (Posted on 4/13/2017)
Totaly love itReview by Gale
Comfort and balance as good or better than pistol grip with adjustable stock. Would not change back at all even if allowed.
Extremely fast shipping, ordered one liked it so well I ordered a second.
Thank you Thordsen (Posted on 2/10/2017)
Highly recommend this stock, no cons.Review by Ike
Very easy to install. For me balance and feel of the stock are better than pistol grip. Would not change back at all.
Shipping extremely fast, already ordered a second one. (Posted on 2/10/2017)
What a great stock.Review by Steve
I am so glad that Thordsen came out with this stock! I just installed three of them in the last couple of days and it could not have been any easier. I had watched the installation video a few times before I received the stocks so it took maybe 10 minutes to install, and the fit and finish were perfect on each one. I was skeptical at first as to how the stock would feel, but it actually feels more natural to me that the standard pistol grip design. There are no cons to this stock.

This is a no brainer for the ban states, but I would also recommend it for any other AR. (Posted on 7/9/2016)
I Like IT !!!Review by MM
I wasn't sure how I was going to like this... But, I must say, I almost like it better than the usual AR pistol grip set up. And,,, I do away with the stupid bullet button (Calif.) (Posted on 7/8/2016)

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